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<table width="100%" summary="page for Backpack"><tr><td>Backpack</td><td style="text-align: right;">R Documentation</td></tr></table>

<h2>Backpack</h2>

<h3>Description</h3>

<p>Backpack weights for a sample of college students
</p>


<h3>Format</h3>

<p>A dataset with 100 observations on the following 9 variables.
</p>

<table summary="Rd table">
<tr>
 <td style="text-align: right;">
    <code>BackpackWeight</code> </td><td style="text-align: left;"> Backpack weight (in pounds)</td>
</tr>
<tr>
 <td style="text-align: right;">
    <code>BodyWeight</code> </td><td style="text-align: left;"> Body weight (in pounds)</td>
</tr>
<tr>
 <td style="text-align: right;">
    <code>Ratio</code> </td><td style="text-align: left;"> BackpackWeight/BodyWeight</td>
</tr>
<tr>
 <td style="text-align: right;">
    <code>BackProblems</code> </td><td style="text-align: left;"> 0=no or 1=yes</td>
</tr>
<tr>
 <td style="text-align: right;">
    <code>Major</code> </td><td style="text-align: left;"> Code for academic major</td>
</tr>
<tr>
 <td style="text-align: right;">
    <code>Year</code> </td><td style="text-align: left;"> Year in school</td>
</tr>
<tr>
 <td style="text-align: right;">
    <code>Sex</code> </td><td style="text-align: left;"> a factor with levels <code>Female</code> <code>Male</code></td>
</tr>
<tr>
 <td style="text-align: right;">
    <code>Status</code> </td><td style="text-align: left;"> Graduate or undergraduate? <code>G</code> or <code>U</code></td>
</tr>
<tr>
 <td style="text-align: right;">
    <code>Units</code> </td><td style="text-align: left;"> Number of credits taken that quarter</td>
</tr>
<tr>
 <td style="text-align: right;">
  </td>
</tr>

</table>



<h3>Details</h3>

<p>A survey of students at California Polytechnic State University (San Luis Obispo) collected data
to investigate the question of whether back aches might be due to carrying heavy backpacks, 
</p>


<h3>Source</h3>

<p>Mintz J., Mintz J., Moore K., and Schuh K., &quot;Oh, My Aching Back! A Statistical Analysis of Backpack Weights,&quot;  Stats: The Magazine for Students of Statistics, vol. 32, 2002, pp. 1719.
</p>


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